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Sagot :

2/9 -6 x4/21

= 2/9 - 24/21

= 2x7/9x7 - 24x 3/21x3

= 14/63 - 72/63

= -58/63

Réponse:

bsr

Explications étape par étape:

C= 2/9 - 6× 4/21

C = 2/9 - 2× 4/7

C = 2/9 - 8/7

C = (14- 72)/ 63

C = - 58/63

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